Temporary binder or loose-sheet holder.



ZNO. 794,778. PATENTED JULY 18, 1905.

H. F. BUSHONG.

TEMPORARY BINDER OR LOOSE SHEET HOLDER;

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UNITED STATES Patented. July 18, 1905.

PATENT OFFICE.

AND MESNE ASSIGNMENTS, TO KALAMAZOO LOOSE LEAF LEDGER OOMPANY, ACORPORATION.

TEMPORARY BINDER OR LOOSE-SHEET HOLDER.

SPECIFICATION forming part of Letters Patent No. 794,'778, dated July18, 1905. Appiiwaon fiiea Jny 13, 1904. serial Ifo. 216.350.

To (ol/Z w/tmn Il'b mjay con/Geru:

Be it known that I, HARRY F. BUsHoNG, a citizen of the United States,residing at the city of Kalamazoo, in the county of Kalamazoo and StateVof Michigan, have invented certain new and useful Improvements inTemporary Binders or Loose-Sheet Holders, of which the following is aspecification.

This invention relates to improvements in Io temporary binders.

The objects of this invention are, first, to provide an improvedtemporary binder for sheets or leaves by which the sheets or leaves aresecurely held without being specially prepared therefor and without inany manner mutilating the same and one in which the sheets may bequickly inserted or removed; second, to provide an improved temporarybinder or loose-sheet holder which is simple and economical inconstruction and convenient and durable in use.

Further objects and objects relating to structural details willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the clevices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims.

A Structure embodying the features of my invention is clearlyillustrated in the accompanying drawings, forming a part of thisspecification, in which- Figure 1 is a perspective view of my improvedtemporary binder or loose sheet holder illustrated with a number ofsheets in position therein. Fig. 2 is a rear elevation view of the same.Fig. 3 is a side elevation view looking from the right of Fig. 2, theleaves or sheets being removed and the movement of the parts beingindicated by dotted lines. Fig. 4 is a detail sectional view taken on aline corresponding to line 4 4 of Figs. 2 and 5, the movement of theparts being indicated by dotted lines. Fig. 5 is a detail sectional viewtaken on a line corresponding to line 5 5 of Fig. 4 with one end of thepin D shown in section, the tension-Spring DI being shown in full lines.Fig. 6 is a detail sectional view taken on a line corresponding to' line6 6 of Fig. 5, the leaf or sheet clamping jaw being shown in its openposition, showing the means for actuating the locking dog or lever E.Fig. 7 is a detail' sectional view taken on aline corresponding to line7 7 of Fig. 5 with the sheet clamping jaw in its open position, showingthe locking dog or lever in its engaging position.

' In the drawings the sectional views are taken looking in the directionof the little arrows at the ends of the section-lines, and similarletters of reference refer to similar parts throughout the severalviews.

Referring to the drawings, l provide a relatively stationary cover A anda swinging cover A'. These covers are provided with rearwardlyprojecting hinge pieces a and cd, respectively, which are rigidlysecured thereto. A pin D is carried by the hingepieces ct.Upwardly-projecting links B' B are journaled on the pin D. These linksare rigidly secured together by a cross-bar B, as clearly appears inFig. 1. The hinge-pieces cd of the cover A' are pivotally secured to theupper ends of these links B' B.

Upon the pin or shaft D is a cylinder O, having a forwardly-projectingclamping-jaw or sheet-holder O' thereon. This cylinder O is connected tothe pin D by the coiled spring D', which is arranged upon the pin. Oneend of this coiled Spring D, is connected to the pin and the other tothe cylinder. This tension- Spring holds the clamping jaw normallyagainst the coverA, and the sheets are clamped between it and the cover.One end of the pin D is provided with a longitudinal keyhole, (see Fig.5,) in which the key is illustrated by dotted lines for adjusting thetension of the Spring. In ad justing the tension of the spring theright-hand hinge-piece a, which is provided with a Square or irregularhole to receive the square `or irregular end of the pin D, is removedfrom the pin, which releases the same. The tension of the Spring maythen be increased or lessened, as desired, by turning the pin. Whensatisfactorily adjusted, the

Game.

hinge-piece is again secured in position, which prevents the turning ofthe pin.

A pawl b is slidably mounted upon the crossbar B, so that it may beadjnsted into and out of its operative or engaging position. When in itsengaging position, this pawl is adapted to engage the tooth or lug c onthe cylinder l(J. A stop b' is provided on the cross-bar B for this pawlb.

When itis desired to release the clamping-jaw, the pawl b is shiftedagainst the stop and the cover A' is opened and carried rearwardly anddo Wnwardly, as indicated by dotted lines in Fig. 4. The pawl engagingthe lug or tooth o on the cylinder opens the cla'mping-jaw against thetension of the spring D'.

A looking dog or lever E, adapted to engage a notch g in the cylinder Cto retain it in its open position, is provided. The locking dog or leverE is pivoted on the cover A. This looking dog or lever is thrown intoengagement with the notch g by a cam o, projecting from the cylinder. Asthe cylinder is revolved this cam c engages the inner end e of the dogor lever E and throws its outer end e' into eng`agement with the notchg. The locking dog or lever E is released by the cam projection f on thelink B', which as the cover A' is returned to its closed positionengages the projection e on the looking-dog and forces it from the notchg, thus freeing the cylinder and allowing the tension-Spring to returnit to its initial position and clamp it down upon the cover A or thesheets placed thereon. As the cover A' is returned to its closedposition the pawl b is engaged by the cam c on the cylinder, by which itis shifted to its initial or normal position. When the pawl b is in itsinitial or normal position, the cover A' may be opened and closedwithout affecting the clamping-jaw. VVhen it is again desired to releaseor open the clamping-jaw, the pawl Z) is shifted against the stop b' andthe cover manipulated, which opens the clamping-jaw, as beforedescribed.

The cam c' is so shaped that when the pawl Z) is in its engagingposition it rides over the same and drops into engagement with the toothor lug c. The pawl b is preferably formed of spring metal, so that itreadily travels over the cam o' and snaps into engagement with the toothc. VVhen formed of spring metal, it also grips the cross-barBsufliciently to prevent its being accidentally shifted.

By my improved temporary binder or looseleaf holder I am enabled toretain the leaves or sheets securely'without the necessity of anyspecial preparation of the sheets therefor "and without in any mannermutilating the At the same time the leaves or sheets are quickly andeasily inserted or removed from the holder.

I have illustrated and described my improved temporary binder orloose-sheet holder in detail'in the form preferred by mc on account ofits structural Simplicity and durability and the econorny of producingthe same. I am, however, aware that it is capable of considerablestructural variation without departing from my invention.

Having thus described my invention, what I olaim as new, and desire tosecure by Letters Patent, ism

1. The combination of a relatively stationary cover and aswinging cover;rearwardlyprojecting rigid hinge-pieces for saidcovers; a pin carried bythe hinge-pieces of said stationary cover; upWardly-projecting links towhich the hinge-pieoes of said swinging cover are pivotally Secured,mounted on said pin; a cross-bar connecting said links; a cylinderhaving a forwardly-projecting clamping-jaw thereon, mounted on said pin;a Spring conneoted to said pin and to said cylinder for applying tensionthereto, whereby said clamping-jaw is held normally against saidstationary cover; a pawl slidably mounted on said cross-bar so that itmay be shifted into or out of its engagi-ng position; a projecting toothor lug on said cylinder adapted to be engaged by said pawl when it isadjusted to its engaging position; a cam on saidv cylinder for returningsaid pawl to its initial position; a

lockinglever or dog on said stationary cover,

adapted to engage said cylinder for looking it in its open position; acam on said cylinder for actuating said looking lever or dog; and a camon one of said links for releasing said looking lever or dog, for thepurpose speoified.

2. The combination of a relatively stationary cover and a swingingcover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of lsaid stationary cover;upwardly-projeoting links to which the hinge-pieces of said swingingcover are pivotally Secured, mounted on said pin; a cross-bar connectingsaid links; a cylinder having a forwardly-projecting clamping-jawthereon, mounted on said pin; a spring connected to saidV pin and tosaid cylinder for applying tension thereto, Whereby said olamping-jaw isheld normally against said stationary cover; a pawl slidably mounted onsaid cross-bar so that it may be shifted into or out of its engagingposition; a projecting tooth or lug on said cylinder adapted to beengaged by said pawl when it is adjusted to its engaging position; alooking lever or dogon said stationary cover, adapted toengage saidcylinder for looking it in its open position; a cam on said cylinder foractuating said looking lever or dog; and a cam on one of said links forreleasing said looking lever or dog, for the purpose specified.

3. The combination of a relatively stationary cover and aswinging cover;rearwardlyprojecting rigid hinge-pieces for said covers;

a pin carried by the hinge-pieces of said sta-` tionary cover;upwardly-projecting links to which the hinge-pieces of said swingingcover IIO are pivotally secured, mounted on said pin; a cross-barconnecting said links; a cylinder having a forwardly-projectingclarnping-jaw thereon, mounted on said pin; a spring connected to saidpin and to said cylinder for ap,- plyng tension thereto, whereby saidclamping-jaw is held normally against said stationary cover; a pawlslidably mounted on said cross-bar so that it may be shifted into or outof its engaging position; a projecting tooth or lug on said cylinder,adapted to be engaged by said pawl when it is adjusted to its engagingposition; a locking lever or dog on said stationary cover, adapted toengage said cylinder for locking it in its open position; and a cam onone of said links for releasing said locking lever or dog, for thepurpose specified.

4:. The combination of a relatively stationary cover and a swinging'cover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of said stationary cover;upwardly-projecting links to which the hinge-pieces of said swingingcover are pivotally secured, mounted on said pin; a cross-bar connectingsaid links; a cylinder having a forwardly-projecting clamping-jawthereon, mounted on said pin; a spring connected to said pin and to saidcylinder for applying tension thereto, whereby said clamping-jaw is heldnormally against said stationary cover; 4a pawl slidably mounted on saidcross-bar so that it may be shifted into or out of its engagingposition; a locking lever or dog on said stationary cover, adapted toengage said cylinder for locking it in its open position; and a cam onone of said links for releasing said locking lever or dog, for thepurpose specified.

5. The combination of a relatively stationary cover and a swingingcover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of said stationary cover;upWardly-projecting links to which the hinge-pieces of said swingingcover are pivotally Secured, mounted on said pin; v

a cross-bar connecting said links; a cylinder having aforwardly-projecting clamping-jaw thereon, mounted on said pin; a Springconnected to said pin and to said cylinder for applying tension thereto,whereby said clamping-jaw is held normally against said stationarycover; a pawl slidably mounted on said cross-bar, so that it may beshifted into or out of its engaging position; a projecting tooth or lugon said cylinder, ad apted to be engaged by said pawl when it isadjusted to its engaging position; a cam on said cylinder for returningsaid pawl to its initial position; a locking lever or dog on saidstationary cover, adapted to engage said cylinder for locking it in itsopen position; and a cam on said cylinder for actuating said locking dogor lever, for the purpose specified.

6. The combination of a relatively stationary cover and a swingingcover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of said stationary cover;upwardly-projecting links' to which the hinge-pieces of said swingingcover are pivotally secured, mounted on said pin; a cross-bar connectingsaid links; a cylinder having a forWardly-projecting clamping-jawthereon, mounted on said pin; a [spring connected to said pin and tosaid cylinder for applying tension thereto, whereby said clamping-jaw isheld normally against said stationary cover; a pawl slidably mounted onsaid cross-bar so that it may be shifted into or out of its engagingposition; a projecting tooth or lug on said cylinder, adapted to beengaged by said pawl when it is adjusted to its engaging position; alocking lever or dog on said stationary cover, adapted to engage saidcylinder for locking it in its open position; and a cam on said cylinderfor actnating said locking lever or dog, for the purpose specified.

7. The combination of a relatively stationary cover and a swingingcover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of said stationary cover;upwardly-projecting links to which the hinge-pieces of said swingingcover are pivotally secured, mounted on said pin; a cross-bar connectingsaid links; a cylinder having a forwardly-projecting clamping-jawthereon, mounted on said pin; a spring connected to said pin and to saidcylinder for applying tension thereto, Whereby said clamping-jaw is heldnormally against said stationary cover; a pawl slidably mounted on saidcross-bar so that it may be shifted into or out of its engagingposition; a projecting tooth or lug on said cylinder, adapted to beengaged by said pawl when it is adjusted to its engaging position; a camon said cylinder for returning said pawl to its initial position; alocking lever or dog on said stationary cover, adapted to engage saidcylinder for locking it in its open position; for the purpose specified.

8. The combination of a relatively stationary cover and a swingingcover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of said stationary cover;upwardly-projecting links to which the hinge-pieces of said swingingcover are pivotally Secured, mounted on said pin; a cross-bar connectingsaid links; a cylinder having a forwardly-projecting clamping-jawthereon, mounted on said pin; a spring connected to said pin and tosaidcylinder for applying tension thereto, whereby said clamping-jaw is heldnormally against said stationary cover; a pawl slidably mounted on saidcross-bar, so that it may be shifted into or out of its engagingposition; a projecting tooth or lug on said cylinder adapted to beengaged bysaid pawl when it is adjusted to its engaging position; and alocking lever or dog on IIO nected to said pin and to said cylinder forapplying tension thereto, whereby said clamping-jaw is held normallyagainst said station-` ary cover; a pawl slidably mounted on saidcross-bar so that it may be shifted into or out of its engagingposition; a projecting tooth or lug on said cylinder adapted to beengaged by said pawl when it is adjusted to its engaging position; and acam on said cylinder for returning said pawl to its initial position,for the purpose specified.

10. The combination of a relatively stationary cover and a swingingcover; rearwardlyprojecting rigid hinge-pieces for said covers; a pincarried by the hinge-pieces of said stationary cover;upWardly-projecting links to which the hinge-pieces of said swingingcover are pivotally secured, mounted on said pin; a cross-bar connectingsaid links; a cylinder having a forwardly-projecting clamping-jawthereon, mounted on said pin; a Spring connected to said pin and to saidcylinder for applying tension thereto, whereby said clamping-jaw is heldnormally against said stationary cover; a pawl slidably mounted on saidcross-bar, so that it may be shifted into or out of its engagingposition; and a projecting tooth or lug on said cylinder adapted to beengaged by said pawl when it is adjusted to lits engaging position, forthe purpose specified.

11. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-projecting linksto which said swinging cover is pivotally secured, mounted on said pin;a clamping-jaw mounted on said pin; a spring connected to said pin andto said clamping-jaw for applying tension thereto, whereby saidclampingjaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug connected with saidclamping-jaw adapted to be engaged by said pawl When it is adjusted toits engaging position; a cam connected with said clamping-jaw forret'urning. said pawl to its initial position; a locking dog or lever onsaid stationary cover for locking it in its open position; a camconnected with said clampingjaw for actuating said locking dog or lever;

and a cam on one of said links for releasing said locking-dog, for thepurpose specified.

12. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-projecting linksto which said swinging cover is pivotally Secured, mounted on said pin;a clamping-jaw mounted on said pin; a spring connected to said pin andto said clamping-jaw for apply-- ing tension thereto, whereby saidclampingjaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug connected with saidclamping-jaw-adapted to be engaged by said pawl when it is adjusted toits engaging position; a locking dog or leve r on said stationary coverfor locking it in its open position; a cam connected with said'clamping-jaw for actuating said locking dog or lever; and a cam on oneof said links for releasing said locking-dog, for the purpose specified.

13. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upWardly-projecting'links to which said swinging cover is pivotally Secured, mounted on saidpin; a clamping-jaw thereon mounted on said pin; a Spring connected tosaid pin and to said clamping-jaw for applying tension thereto, Wherebysaid clamping-jaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug connected with saidclamping-jaw adapted to be engaged by said pawl when it is adjusted toits engaging position; ,a cam connected with said clamping-jaw forreturning said pawl to its initial position; a locking dog or lever onsaid stationary cover for locking it in its open position; and a cam onone of .said links for releasing said locking-dog, for the purposespecified. i'

14. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-projecting linksto which said swinging cover is pivotally Secured, mounted on said pin;a clamping-jaw thereon mounted on said pin; a spring connected to saidpin and to said clamping-jaw for applying tension thereto` Whereby saidclamping-jaw is held normally against said IOO stationary cover; anadjustable pawl carried IZO ary cover and a swinging cover; a pincarried by said stationary cover; upwardly-projecting links to whichsaid swinging cover is pivotally secured, mounted on said pin; aclamping-jaW thereon mounted on said pin; a spring connected to said pinand to said clamping-jaw for applying tension thereto, Whereby saidclamping-jaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug on said clampingjawadapted to be engaged by said pawl When it is adjusted to its engagingposition; a cam connected With said claznping-jaw for returning saidpawl to its initial position; a looking dog or lever on said stationarycover for looking the clamp in its open position; and a cam connectedWith said clamping-jaw for actuating said looking dog or lever; for thepurpose specified.

16. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-proj ectin glinks to which said swinging cover is pivotally Secured, mounted on saidpin; a clamping-jaw thereon mounted on said pin; a spring connected tosaid pin and to said clamping-jaw for applying tension thereto, wherebysaid clamping-jaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug connected with saidclamping-jaw adapted to be engaged by said pawl When it is adjusted toits engaging position; a looking dog or lever on said stationary coverfor looking it in its open position; and a cam connected with saidclamping-jaw for actuating said locking dog or lever, for the purposespecified.

17. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-projecting linksto which said swinging cover is pivotally Secured, mounted on said pin;a clamping-jaw thereon mounted on said pin; a spring connected to saidpin and to said clamping-jaw for applying tension thereto, Whereby saidclamping-jaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug connected with saidclamping-jaw adapted to be engaged by said pawl when it is adjusted toits engaging position; a cam connected With said clamping-jaw forreturning said pawl to its initial position; anda locking dog or leveron said stationary cover for locking it in its open position, for thepurpose specified.

18. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-projecting linksto which said swinging cover is pivotally Secured, mounted on said pin;a clamping-jaw mounted on said pin; a spring connected to said pin andto said clamping-jaw for applying tension thereto, whereby saidclampingjaW is held normally against said stationary cover; an adjustable pawl carried by said links adapted to be shifted into or out ofits engaging position; a projecting tooth or lug connected With saidclamping-jaw adapted to be engaged by said pawl When it is adjusted toits engaging position; and a locking dog or lever on said stationarycover for looking it in its open position, for the purpose specified.

19. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upwardly-projecting linksto which said swinging cover is pivotally Secured, mounted on said pin;a clamping-jaw mounted on said pin; a spring connected to said pin andto said clamping-jaw for applying tension thereto, Whereby saidclampingjaw is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its engaging position; a projecting tooth or lug connected With saidclamping-jaw adapted to be engaged by said pawl When it is adjusted toits engaging position; and a cam connected With said clampng-jaw forreturning said pawl to its initial position, for the purpose specifieol.

20. The combination of a relatively stationary cover anda swingingcover; a pin carried bysaid stationary cover; upvvardly-projecting linksto which said swinging cover is pivotally Secured, mounted on said pin;aclamping-jaw mounted on said pin; a spring connected to said pin and tosaid clamping-jaw for applying tension thereto, Whereby said clampingjawis held normally against said stationary cover; an adjustable pawlcarried by said links adapted to be shifted into or out of its engagingposition; and a projecting tooth or lug connected With saidvclamping-jawadapted to be engaged by said pawl When it is adjusted to (iits engagingposition, for the purpose speci- 21. The combination of a relativelystationary cover and aswinging cover; a pin carried by said stationarycover; upwardly-projecting links to which said swinging cover ispivotally secured, mounted on said pin; a clamping-jaw mounted on saidpin; a spring connected to said pin and to said clamping-jaw forapplying tension thereto, whereby said clampingjaw is held normallyagainst said stationary cover; an adjustable pawl carried by said linksadapted to be shifted into or out of operative position; a projectingtooth or lug connected With said clamping-jaw adapted to be engaged bysaid pawl when it is adjusted to its operative position; a camconnectedWith said clamping-jaw for returning said pawl to its initial position;a dog for looking said clarnping-jaw in its open position; anda cam onone of said links for releasing said dog, for the purpose Specified.

22. The combination of a relatively Station- IOS IIO

ary cover and a swinging cover; apin carried by said stationary cover;upWardly-projecting links to which said swinging cover is pivotallysecured, mounted on said pin; a clamping-jaW mounted on said pin; aspring connected to said pin and to said clamping-jaw for applyingtension thereto, Whcreby said clamping-jaw is held normally against saidstationary cover; an adjustable pawl carried by said links adapted to beshifted into or out of its operative position; a projecting tooth or lugconnected With said clamping-javv adapted to be engaged by said pawlWhen it is adjusted to its operative position; a dog for locking saidclamping-jaw in its open position; and a cam on one of said links forreleasing said dog, for the purpose specified.

23. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upWardly-projecting linksto which said swinging cover is pivotally secured, mounted on said pin;a clamping-jaw mounted on said pin; a spring connected to said pin andto said clamping-jaw for applying tension thereto, Whereby saidclamping-jaW is held normally against said stationary cover; anadjustable pawl carried by said links adapted to be shifted into or outof its operative position; a projecting tooth or lug connected With saidclamping-jaw adapted to be engaged by said pawl When it is adjusted toits operative position; a cam connected With said clamping-jaw forreturning said pawl to its initial position; and a cam on one of saidlinks for releasing said dog, for the purpose specified.

24. The combination of a relatively stationary cover and a swingingcover; a pin carried by said stationary cover; upWardly-projecting linksto Which said swinging cover is pivotally secured, mounted `on said pin;a clamping-jaw mounted on said pin; a spring connected to said pin andto said clamping-jaw for applying tension thereto, Whereby saidclamping-jaW is held normally against said stationary cover; anadjustable pawl connect- -ed to said swinging cover adapted to beshifted into or out of its operative position; a projecting tooth or lugconnected With said clamping-jaw adapted to be engaged by said pawl Whenit is adjusted to its operative position; and a dog for locking saidclamping-jaw in its open position, for the purpose specified.

25. The combination of a relatively stationary cover and a swingingcover; a clampingjaw mounted on said stationary cover; a spring adaptedto hold said clamping-jaw normally against said stationary cover; anadjustable pawl connected to said swinging cover adapted to be shiftedinto and out of operative position; a tooth or lug connected With saidclampingjaw adapted to be engaged by said pawl When it is in itsoperative position; means for returning said pawl to its initialposition When said swinging cover is closed; adog for locking saidclamping-jaw in its open position; and means for releasing said dog Whensaid swinging cover is closed, for the purpose specified.

26. The combination of a relatively stationary cover and a swingingcover; a clampingjaW mounted on said stationary cover; a spring adaptedto hold said clamping-jaw normally against said stationary cover; anadjustable pawl connected to said swinging cover adapted to be shiftedinto and out of operative position; a tooth or lug connected With saidclamping-jaw adapted to be engaged by said pawl When it is in itsoperative position; a dog for locking said clamping-jaw in its openposition; and means for releasing said dog When said swinging cover isclosed, for the purpose specified.

27. The combination of a relatively stationary cover and a swingingcover; a clampingjaw mounted on said stationary cover; a spring adaptedto hold said clamping-jaw normally against said stationary cover; anadjustable pawl connected to said swinging cover adapted to be shiftedinto and out of operative position; a tooth or lug connected with saidclampi-ng-jaw adapted to be engaged by said pawl When it is in itsoperative position; means for returning said pawl to its initialposition When said swinging cover is closed; and a dog for locking saidclamping-jaw in its open position, for the purpose specified.

28. The combination of a relatively stationary cover and a swingingcover; a clampingjaw mounted on said stationary cover; a spring adaptedto hold said clamping-jaw normally against said stationary cover; anadjustable pawl connected to said swinging cover adapted to be shiftedinto and out of operative position; a tooth or lugconnected With saidclamping-jaw adapted to be engaged by said pawl When it is in itsoperative position; and a dog for locking said clamping-jaw in its openposition, for the purpose specified.

29. The combination of a relatively stationary cover and a swingingcover; a clampingjaW mounted on said stationary cover; a Spring adaptedto hold said clamping-jaw normally IOO IIO

against said stationary cover; an adjustable pawl connected to saidswinging cover adapted to be shifted into and out of operative position;a tooth or lug connected With said clamping-jaw adapted to be engaged bysaid pawl When it is in its operative position; and means for returningsaid pawl to its initial position when said swinging cover is closed,for the purpose specified.

30. The combination of a relatively stationary cover and a swingingcover; a clampingjaW mounted on said stationary cover; a Spring adaptedto hold said clamping-jaW normally against said stationary cover; anadjustable pawl connected to said swinging cover adapted to be shiftedinto and out of operative position; and a tooth or lug connected Withsaid IIS clamping-jaw adapted to be engaged by said pawl When it is inits operative position, for the purpose specified.

31. The combination of a relatively stationary cover and a swingingcover; a clampingjaw moun ted on said stationary cover; aspring adaptedto hold said clamping-jaw normally against said stationary cover; anadjustable pawl connected to said swinging cover, adapted to engage saidclamping-jaw When in its operative position; and means for returningsaid pawl automatically to its initial position, When said swingingcover is closed, for the purpose specified.

32. The combination of a relatively stationary cover and a swingingcover; a clampingjaW monnted on said stationary cover; a Spring adaptedto hold said clamping-jaw normally against said stationary cover; and anadjustable pawl connected to said swinging cover,

adapted to engage said clamping-jaw When in izsdoperative position, forthe purpose speci- 33. rJhe combination of a relatively stationary coverand a swinging cover; a clampingjaW mounted on said stationary cover; aSpring adapted to hold said clamping-jaw normally against saidstationary cover; a pawl connected to said swinging cover, adapted to bethrown into and out of engaging position, adapted to engage saidclatnping-jaw When in tsdengaging position, for the purpose speci- InWitness Whereof I have hereunto set my hand and seal in the presence oftwo witnesses.

HARRY F. BUSHONG. [L. s.] Witnesses:

ETHEL A. TELLER, OrIs A. EARL.

